seondary oocytes

haploid and first polar body

zygote to

cleavage.... 2,4,8 celled...

cleavage to

morula

morula to

blastocyt

blastocyt

implants

primary oocyte is enclosed

in a follicle

ooctye is surrounded by a layer

of granulosa cells and an outer layer called theca

50

Folliular phase (day 1-13)

fsh stimulated follicle maturation

51

FSH and LH stimulate production

of estrogen by the maturing follicle

52

The follicular remains become

corpus luteum

53

Luteal Phase(Day 15-28)

th corpus luteum secretes estrogen and progesterone.... corpus luteum degenerates thorughout the phase bc of low LH.... estrogen and progestrone levles drop at the end of this phase signaling menstuation all over again

54

Pregnancy occurs... what horomone is produced?

hCG

55

hCG keeps

the corpus luteum from degeneragting in place of lH

56

Corpus luteum during pregnancy maintins

high levles of estrogen and progestrone (first 2-3 months)

57

the placenta

takes over production of estrogen and progestrone for the remainder of the pregnancy

58

the endometrium isnt shed...

ovulation does not occur, LH remains low

59

GnRH in women

stimualtes release of LH and FSH

60

LH in women

stimulates the follicle to produce estrogen

61

FSH in women

stimuatles the follicle to mature...

62

Estrogen inhiibts

release of GnRH, LH, and FSH

63

Follicles release

ihibin of FSH

64

Meses(1-7)

endometrium is lsoughed off; signalled by low levels of estrogen and progestrogene

65

Proliferative Phase(7-14) mentstral cycle

increasing levesll of estrogen lead to endometrial growth

66

secretory phase(15-28) mentstral cycle

preperation for implantation. endometirla cell deposit lipids and glycogen in their cytoplasm

67

Fertilization takes place

in fallopian tubes

68

acrosomess contains

enzymes that allow the sperm to penetrate the corona radiata and zona pellucida

69

how many sperm fertalize ovum

single sperm

70

what prevents more sperm from fertalizing

depolarization and an influx in Ca prevent subsequent sperm from penetrating